package com.foreknow.elmboot.mapper;

import com.foreknow.elmboot.po.Cart;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Update;

import java.util.List;

@Mapper
public interface CartMapper {
  /**
   * 查询购物车的信息
   * @param cart
   * @return
   */
  public List<Cart> listCart(Cart cart);

  @Insert("insert into cart(foodId,businessId,userId,quantity) values(#{foodId},#{businessId},#{userId},1)")
  public int saveCart(Cart cart);

  @Update("update cart set quantity=#{quantity} where foodId=#{foodId} and businessId=#{businessId} and userId=#{userId}")
  public int updateCart(Cart cart);

  /**
   * 删除购物车
   * @param cart
   * @return
   */
  public int removeCart(Cart cart);
}
